Sheath control with plasma wall bias for the collimated ion beam generation

It is important to find collimated ion beam condition for neutral beam generation. Ion beam quality is dependent of acceleration grid hole geometry and plasma properties. We focus on dependence on plasma properties such as sheath dynamics. In order to form sheath in high density plasma, ICP like heating is modeled and 2D particle in cell (PIC) simulation is performed. It is confirmed that the sheath is deformed by plasma density and Sheath is able to be controlled by plasma wall bias.